Replacing Poly-V belt (Inspection III) (every 60,000 km/36,000 miles) • If necessary, disengage fuel tank and pull to the rear. 3 2 4 12 3 510 RS110480 1 • Slacken alternator mounting screws and nuts (1,3,4) and install a new Poly-V belt if necessary. 12 3 520 Poly-V belt adjusting procedure: Poly-V belt installation procedure: • Place the Poly-V belt in position, tension it and turn the engine over once, then relieve belt ten- sion. R21000190 • Remove cover to expose spark plug caps. • Pull off spark plug caps with special puller, BMW No. 12 3 520 . • Remove spark plugs with the spark plug wrench, BMW No. 12 3 510 . Poly-V belt tensioning procedure: 1.
Slightly tighten hex nut (1) on adjusting screw (2) by hand ( do not use tools ). 2. Tighten adjusting screw (2) with a torque wrench and keep preload applied. 3. Tighten upper retaining nut (3), then remove torque wrench from adjusting screw. 4. Tighten all screws and nuts. Tightening torque: Poly-V belt preload......................................... 8 Nm Alternator to alternator support cover........................... 20 Nm RS110490 • Remove front cover. 00.27